<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
body { font:12px/19px Arial, Helvetica, sans-serif; color:#666;}
form div { margin:5px 0;}
.int label { float:left; width:100px; text-align:right;}
.int input { padding:1px 1px; border:1px solid #ccc;height:16px;}
.sub { padding-left:100px;}
.sub input { margin-right:10px; }
.formtips{width: 200px;margin:2px;padding:2px;}
.onError{
 background:#FFE0E9 url(../img/reg3.gif) no-repeat 0 center;
 padding-left:25px;
}
.onSuccess{
 background:#E9FBEB url(../img/reg4.gif) no-repeat 0 center;
 padding-left:25px;
}
.high{
 color:red;
}

</style>
<!-- 引入jQuery -->
<script src="jquery.js" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
$(function(){
 //如果是必填的，则加红星标识.
 $("form :input.required").each(function(){
 var $required = $("<strong class='high'> *</strong>"); //创建元素
 $(this).parent().append($required); //然后将它追加到文档中
 });
 //文本框失去焦点后
 $('form :input').blur(function(){
 var $parent = $(this).parent();
 $parent.find(".formtips").remove();
 //验证用户名
 if( $(this).is('#username') ){
 if( this.value=="" || this.value.length < 6 ){
 var errorMsg = '请输入至少6位的用户名.';
 $parent.append('<span class="formtips onError">'+errorMsg+'</span>');
 }else{
 var okMsg = '输入正确.';
 $parent.append('<span class="formtips onSuccess">'+okMsg+'</span>');
 }
 }
 //验证邮件
 if( $(this).is('#email') ){
 if( this.value=="" || ( this.value!="" && !/.+@.+\.[a-zA-Z]{2,4}$/.test(this.value) ) ){
 var errorMsg = '请输入正确的E-Mail地址.';
 $parent.append('<span class="formtips onError">'+errorMsg+'</span>');
 }else{
 var okMsg = '输入正确.';
 $parent.append('<span class="formtips onSuccess">'+okMsg+'</span>');
 }
 }
 }).keyup(function(){
 $(this).triggerHandler("blur");
 }).focus(function(){
 $(this).triggerHandler("blur");
 });//end blur

 
 //提交，最终验证。
 $('#send').click(function(){
 $("form :input.required").trigger('blur');
 var numError = $('form .onError').length;
 if(numError){
 return false;
 }
 alert("注册成功,密码已发到你的邮箱,请查收.");
 });

 //重置
 $('#res').click(function(){
 $(".formtips").remove();
 });
})
//]]>
</script>
</head>
<body>

<form method="post" action="">
 <div class="int">
 <label for="username">用户名:</label>
 <input type="text" id="username" class="required" />
 </div>
 <div class="int">
 <label for="email">邮箱:</label>
 <input type="text" id="email" class="required" />
 </div>
 <div class="int">
 <label for="personinfo">个人资料:</label>
 <input type="text" id="personinfo" />
 </div>
 <div class="sub">
 <input type="submit" value="提交" id="send"/><input type="reset" id="res"/>
 </div>
</form>

</body>